cocoa - @selector 的语法

Question

无需使用NSInvocau即可，假设我有以下代码:

...
array = [NSMutableArray arrayWithObjects:@"Yoda", @"Jedi", @"Darth Vader", @"Darth Vader", @"Darth Vader" , @"Darth Vader", nil];

SEL removeObjectMessage = @selector(removeObject:inRange:);

//does array allow us to remove and object in a range? if so let's do this    
if ([array respondsToSelector:removeObjectMessage]){   
    NSRange darthVaderRange=NSMakeRange(2, 3);
    [array removeObject:@"Darth Vader"inRange:darthVaderRange];
}

我将如何以 SEL removeObjectMessage 的形式执行最后一行？我必须在范围周围放一个 wrapper 吗？我只是想看看所有这些困惑的语法看起来如何......

Answer 1

你可以这样做:

if ([array respondsToSelector:removeObjectMessage]){   
    NSRange darthVaderRange=NSMakeRange(2, 3);
    objc_msgSend(array, removeObjectMessage, @"Darth Vader", darthVaderRange);
}

虽然这看起来很脆弱......